function alertWin(title, msg, w, h){ 
	var titleheight = "0px"; // 提示窗口標題高度 
	var bordercolor = ""; // 提示窗口的邊框顔色 
	var titlecolor = ""; // 提示窗口的標題顔色 
	var titlebgcolor = ""; // 提示窗口的標題背景色
	var bgcolor = ""; // 提示內容的背景色
	
	var iWidth = document.documentElement.clientWidth; 
	var iHeight = document.documentElement.clientHeight; 
	var bgObj = document.createElement("div"); 
	bgObj.style.cssText = "position:absolute;left:0px;top:0px;width:"+iWidth+"px;height:"+Math.max(document.body.clientHeight, iHeight)+"px;filter:Alpha(Opacity=70);opacity:0.7;background-color:#000000;z-index:101;";
	document.body.appendChild(bgObj); 
	bgObj.onclick = function(){ 
		document.body.removeChild(bgObj); 
		document.body.removeChild(msgObj); 
	} 
	
	var msgObj=document.createElement("div");
	msgObj.style.cssText = "position:absolute;font:12px 'Arial, Helvetica, sans-serif';top:"+(iHeight-h)/2+"px;left:"+(iWidth-w)/2+"px;width:"+w+"px;height:"+h+"px;text-align:center;z-index:102;";
	document.body.appendChild(msgObj);
	
	var table = document.createElement("table");
	msgObj.appendChild(table);
	table.style.cssText = "margin:0px;border:0px;padding:0px;";
	table.cellSpacing = 0;
	var tr = table.insertRow(-1);
	var titleBar = tr.insertCell(-1);
	titleBar.style.cssText = "width:100%;height:0px;text-align:left;padding:0px;margin:0px;font:bold 12px 'Arial, Helvetica, sans-serif';color:"+titlecolor+";cursor:move;background-color:" + titlebgcolor;
	titleBar.style.paddingLeft = "0px";
	titleBar.innerHTML = title;
	var moveX = 0;
	var moveY = 0;
	var moveTop = 0;
	var moveLeft = 0;
	var moveable = false;
	var docMouseMoveEvent = document.onmousemove;
	var docMouseUpEvent = document.onmouseup;
	titleBar.onmousedown = function() {
		var evt = getEvent();
		moveable = true; 
		moveX = evt.clientX;
		moveY = evt.clientY;
		moveTop = parseInt(msgObj.style.top);
		moveLeft = parseInt(msgObj.style.left);
		
		document.onmousemove = function() {
			if (moveable) {
				var evt = getEvent();
				var x = moveLeft + evt.clientX - moveX;
				var y = moveTop + evt.clientY - moveY;
				if ( x > 0 &&( x + w < iWidth) && y > 0 && (y + h < iHeight) ) {
					msgObj.style.left = x + "px";
					msgObj.style.top = y + "px";
				}
			}	
		};
		document.onmouseup = function () { 
			if (moveable) { 
				document.onmousemove = docMouseMoveEvent;
				document.onmouseup = docMouseUpEvent;
				moveable = false; 
				moveX = 0;
				moveY = 0;
				moveTop = 0;
				moveLeft = 0;
			} 
		};
	}
	
	var msgBox = table.insertRow(-1).insertCell(-1);
	msgBox.style.cssText = "font:10pt 'Arial, Helvetica, sans-serif';";
	msgBox.colSpan  = 2;
	msgBox.innerHTML = msg;
	
    // 獲得事件Event物件，用於相容IE和FireFox
    function getEvent() {
	    return window.event || arguments.callee.caller.arguments[0];
    }
}